1. Department of Medicine University of California San Francisco California USA
2. Department of Bioengineering and Therapeutic Sciences University of California San Francisco California USA
3. Bay Area Pediatrics Oakland California USA
4. Children's Hospital and Research Center Oakland Oakland California USA
5. Department of Pediatrics Section of Pulmonology Baylor College of Medicine and Texas Children's Hospital Houston Texas USA
6. Pediatric Pulmonary Division Jacobi Medical Center Bronx New York USA
7. Department of Allergy and Immunology Kaiser Permanente‐Vallejo Medical Center Vallejo California USA
8. Veterans Caribbean Health Care System San Juan Puerto Rico USA
9. The Ann and Robert H. Lurie Children's Hospital of Chicago Chicago Illinois USA
10. Department of Pediatrics University of California Los Angeles Los Angeles California USA
11. Department of Epidemiology & Biostatistics Graduate School of Public Health & Health Policy City University of New York New York New York USA
12. Centro de Neumologia Pediatrica Caguas Puerto Rico USA
13. Genomics and Health Group Department of Biochemistry, Microbiology, Cell Biology and Genetics Universidad de La Laguna San Cristóbal de La LagunaSanta Cruz de Tenerife Spain
14. CIBER de Enfermedades Respiratorias Instituto de Salud Carlos III Madrid Spain